Argument: NATO is in an existential crisis in Afghanistan so should not expand
Steven Lee Myers and Thom Shanker. "NATO Expansion, and a Bush Legacy, Are in Doubt". The New York Times. 12 Mar. 2008 - Analysts on both sides of the Atlantic agree that the NATO mission in Afghanistan is a litmus test on the credibility of the trans-Atlantic alliance. If the 26 nations that comprise NATO can’t sustain a coalition against the Taliban, which helped orchestrate the Sept. 11, 2001, attacks against the U.S. homeland that prompted NATO’s his¬toric invocation of its mutual defense clause, then friend and foe alike have good reason to doubt the durability of the alliance.